API Security Checklist : Checklist of the most important security countermeasures when designing, testing, and releasing your API.
Pro Git : The entire Pro Git book, written by Scott Chacon and published by Apress, is available here
CSSdoc : This is a draft to bring automatic documentation to CSS files, like its known for JavaScript and PHP files through JavaDoc/DocTags.
WebPlatform.org : Web Platform Docs is a community-driven site that aims to become a comprehensive and authoritative source for web developer documentation.
This guide describes a set of HTTP+JSON API design practices, originally extracted from work on the Heroku Platform API.